Asymptotic Analysis II: Surveys and New Trends (Lecture Notes in Mathematics, 985)
Asymptotic Analysis for Integrable Connections with Irregular Singular Points (Lecture Notes in Mathematics, 1075)
Asymptotic Behavior of Monodromy: Singularly Perturbed Differential Equations on a Riemann Surface (Lecture Notes in Mathematics, 1502)
Galois Theory of Difference Equations (Lecture Notes in Mathematics, 1666)
Integrales Exponentielles: Developpements Asymptotiques, Proprietes Lagrangiennes (Lecture Notes in Mathematics, 937) (French Edition)
Equations Differentielles et Systemes de Pfaff dans le Champs Complexe II: Seminaire (Lecture Notes in Mathematics, 1015) (French and English Edition)
Local Theory of Nonlinear Analytic Ordinary Differential Equations (Lecture Notes in Mathematics, 702)
Oscillation Theory (Lecture Notes in Mathematics, 324)
Asymptotic Analysis: From Theory to Application (Lecture Notes in Mathematics, 711)
Vorlesungen über asymptotische Reihen (Lecture Notes in Mathematics, 301) (German Edition)